[FFmpeg-trac] #2264(avfilter:new): subtitles filter does not accept ass files with Comment events

[FFmpeg]

#2264: subtitles filter does not accept ass files with Comment events
--------------------------------------+-----------------------------------
               Reporter:  cehoyos     |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  normal      |              Component:  avfilter
                Version:  git-master  |               Keywords:  subtitles
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+-----------------------------------
 I will upload an ass file made with mkvextract from a sample uploaded to
 demonstrate vlc ticket 8147.
 The ass file works fine with (mplayer and) -vf ass but cannot be opened by
 -vf subtitles because it contains "Comment" events.
 {{{
 $ ffmpeg -f lavfi -i testsrc -vf "subtitles=\[sage\]_Bakuman_S3_-
 _18_\[720p\]\[9689D178\].ass" -qscale 2 -t 30 out.avi
 ffmpeg version N-49841-ga63dc84 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Feb 12 2013 16:33:13 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl --disable-indev=jack --enable-libmp3lame
 --enable-libass
   libavutil      52. 17.101 / 52. 17.101
   libavcodec     54. 91.102 / 54. 91.102
   libavformat    54. 62.100 / 54. 62.100
   libavdevice    54.  3.103 / 54.  3.103
   libavfilter     3. 37.101 /  3. 37.101
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 [lavfi @ 0x2518000] Estimating duration from bitrate, this may be
 inaccurate
 Input #0, lavfi, from 'testsrc':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240
 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
 Please use -q:a or -q:v, -qscale is ambiguous
 [ass @ 0x252f280] Estimating duration from bitrate, this may be inaccurate
 [AVFilterGraph @ 0x24fc460] Error initializing filter 'subtitles' with
 args '[sage]_Bakuman_S3_-_18_[720p][9689D178].ass'
 Error opening filters!
 }}}
 {{{
 $ ffmpeg -f lavfi -i testsrc -vf "ass=\[sage\]_Bakuman_S3_-
 _18_\[720p\]\[9689D178\].ass" -qscale 2 -t 30 out.avi
 ffmpeg version N-49841-ga63dc84 Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Feb 12 2013 16:33:13 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl --disable-indev=jack --enable-libmp3lame
 --enable-libass
   libavutil      52. 17.101 / 52. 17.101
   libavcodec     54. 91.102 / 54. 91.102
   libavformat    54. 62.100 / 54. 62.100
   libavdevice    54.  3.103 / 54.  3.103
   libavfilter     3. 37.101 /  3. 37.101
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 [lavfi @ 0x340d000] Estimating duration from bitrate, this may be
 inaccurate
 Input #0, lavfi, from 'testsrc':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240
 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
 Please use -q:a or -q:v, -qscale is ambiguous
 [Parsed_ass_0 @ 0x3412900] [0x33f0da0]: Warning: no style named 'Sign'
 found, using 'Default'
 [Parsed_ass_0 @ 0x3412900] Added subtitle file: '[sage]_Bakuman_S3_-
 _18_[720p][9689D178].ass' (24 styles, 1165 events)
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf54.62.100
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 320x240 [SAR
 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 tbn, 25 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo -> mpeg4)
 Press [q] to stop, [?] for help
 [Parsed_ass_0 @ 0x3412900] fontconfig: Selected font is not the requested
 one: 'DejaVu Sans Bold' != 'PT Sans'
 [Parsed_ass_0 @ 0x3412900] fontconfig: Selected font is not the requested
 one: 'DejaVu Sans' != 'Sketchbook Nasty'
 [Parsed_ass_0 @ 0x3412900] fontconfig: Selected font is not the requested
 one: 'DejaVu Sans' != 'The Great Escape'
 [Parsed_ass_0 @ 0x3412900] fontconfig: Selected font is not the requested
 one: 'DejaVu Sans Bold Oblique' != 'PT Sans'
 frame=  750 fps=0.0 q=2.0 Lsize=    1734kB time=00:00:30.00 bitrate=
 473.5kbits/s
 video:1710kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 1.376683%
 }}}
 Encoding with -vf subtitles works fine if I remove all "Comment" events
 (or rename them to "Dialogue").

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2264>
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